核-壳异质结构ZnO/ZnS复合材料的光催化性能
The Photocatalytic Performance of Core-Shell Heterostructure ZnO/ZnS Composites
何志远 1王天维 1李金龙 1朱昱行 1龚凌耀 1李奕怀1
作者信息
- 1. 上海第二工业大学 能源与材料学院,上海 201209
- 折叠
摘要
为提高ZnO光催化有机废水处理效率,运用水热法结合离子交换法制备了核-壳异质结构的ZnO/ZnS复合材料,并评估其在甲基橙有机废水处理中的催化性能.经XRD、SEM和TEM表征,证实已成功制备了具有棒状核-壳异质结构的ZnO/ZnS复合材料,并初步探讨了其形成机理.实验结果表明,随着离子交换时间的增加,ZnS逐渐包覆于棒状ZnO结构表面,形成核-壳异质结构.此结构不仅拓宽了 ZnO的光谱吸收范围,还提高了其催化性能.当光照反应时间达到180 min时,ZnO/ZnS复合材料对甲基橙的降解率达到80.05％,较纯ZnO催化剂提高了 30％.核-壳异质结构的ZnO/ZnS复合材料为进一步提升ZnO光催化技术在有机废水处理中的应用效果提供了一种新的途径.
Abstract
In order to enhance the effect of ZnO photocatalytic organic wastewater,ZnO/ZnS composites with core-shell heterostructure were prepared by hydrothermal method combined with ion exchange technique,and their catalytic degradation of methyl orange organic wastewater was investigated.By XRD,SEM,TEM characterization,it was confirmed that ZnO/ZnS composites with rod-core-shell heterostructure were prepared successfully,and the formation mechanism was preliminarily discussed.The experimental results show that with the increase of ion exchange time,ZnS gradually formed core-shell heterostructure on the rod-shaped ZnO surface.The structure not only broadens the spectral absorption range of ZnO,but also improves its catalytic performance.When the reaction time reaches 180 min,the methyl orange degradation rate of ZnO/ZnS composites reaches 80.05％,which is 30％higher than that of pure ZnO catalyst.ZnO/ZnS composites with core-shell heterostructure provide a new method for further improving the application effect of ZnO photocatalysis technology in organic wastewater treatment.
关键词
核-壳结构/水热法/离子交换法/光催化Key words
core-shell structure/hydrothermal method/ion exchange method/photocatalysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据